This shot is very underrated and is one I use regularly during a match. It can be used when on the wrong end of a rally in order to relieve the pressure. It can also be used as an alternative attacking shot. Most players expect attacking shots to be hit hard or short, so the surprise element works hugely in favour of the lob. An important point to note on the form of a lob is not that you are trying to reach the back wall but you are trying to gain as much on the ball close to the front wall as possible. This stops your opponent volleying and, therefore, gives you plenty of time to recover your position.
What you have to do, therefore, is hit under the ball to ensure that when it strikes the front wall it is near the top red line. In the forehand lob clip you do not see the ball striking the wall as it is so high on the front wall. The follow through then gives the ball the pace to then reach the back of the court. The only important thing is to get your racquet under the ball, to hit it as high on the front wall as you possibly can and follow through fully.
Lob: Forehand
Lob: Backhand